Reputation: 297
first, I was only trying to update a modified model. Lets say, we talk about "Article" as a model. The following method is implemented in a class called "Articles":
public static void SaveArticle(Article article)
{
if (article.Id == 0)
{
webEntities.Articles.Add(article);
}
else
{
webEntities.Articles.Attach(article);
webEntities.Entry(article).State = EntityState.Modified;
}
webEntities.SaveChanges();
}
So whenever I want to save an modified article in a controller action, I just have to call "Articles.SaveArticle(myArticle);", which works as expected.
So far so good but this means I would need to implement this redundantly for every model/entity.
Then I thought about something like a template-pattern. I.e. a class called "Entity" where "Article" inherits from "Entity".
Furthermore, a class called "Entities" contains a static method like this:
public static void SaveEntity(Entity entity)
{
if (Entity.Id == 0) // <-- Problem 1
{
webEntities.Entities.Add(entity); // <-- Problem 2
}
else
{
webEntities.Entities.Attach(entity); // <-- Problem 3
webEntities.Entry(entity).State = EntityState.Modified; // <-- Problem 4
}
webEntities.SaveChanges();
}
So I would not need to implement it redundantly but I don't know how to solve the problems mentioned in the code above. Do I think too complicated or what would be a best practice to my problem?
Thanks in advance!
Kind regards
Upvotes: 0
Views: 86
Reputation: 109255
Use generics.
public static void Save<T>(T entity)
where T : class
{
webEntities.Set<T>().AddOrUpdate(entity);
webEntities.SaveChanges();
}
AddOrUpdate
is an extension method in System.Data.Entity.Migrations.
Upvotes: 1